It would be nice to have the options to choose the behavior of the expandable area:
It starts with being expanded and you have to retract it or
it starts with being retracted and you have to expand it.

Maybe with a checkbox or a radio button.

We have a customer that wants to show (have it expanded) a folder list on a custom Landing Page. But as soon as there are too many items, the customer wants to change the expandable area the be retracted by default.